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<html>
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1" />
        <script src="lib/simpleRequire.js"></script>
        <script src="lib/config.js"></script>
    </head>
    <body>
        <style>
            html, body, #main {
                margin: 0;
                width: 100%;
                height: 100vh;
            }
        </style>

        <div id="main"></div>

        <script>
            require(['echarts'], function (echarts) {
                var chart = echarts.init(document.querySelector("#main"), 'dark');
                window.onresize = chart.resize;

                const sankeyData = [
                    {source: 'EasyGrid Energy', target: 'Chip Industry', value: 860},
                    {source: 'EasyGrid Energy', target: 'Industrial Internet', value: 1600},
                    {source: 'EG Green Energy', target: 'Chip Industry', value: 2600},
                    {source: 'EG Green Energy', target: 'IOT', value: 500},

                    {source: 'Industrial Internet', target: 'IOT', value: 800},
                    {source: 'Industrial Internet', target: 'Intelligent Manufacturing', value: 600},

                    {source: 'Chip Industry', target: 'Chip Manufacturing', value: 1600},
                    {source: 'Chip Industry', target: 'Chip Package', value: 1200},
                    {source: 'Chip Industry', target: 'Chip Design', value: 600},

                    {source: 'Chip Manufacturing', target: '5mm', value: 600},
                    {source: 'Chip Manufacturing', target: '10mm', value: 500},
                    {source: 'Chip Manufacturing', target: '15mm', value: 500}
                ];

                var option = {
                    title: {text: 'The values of Label and Tooltip are the same',padding: 20},
                    series: [{
                        type: 'sankey',
                        layout: 'none',
                        lineStyle: {color: 'gradient', curveness: 0.5},
                        emphasis: {focus: 'adjacency'},
                        data: getNames(),
                        links: sankeyData,
                        label: {
                            formatter: (params) => {
                                return params.name + ': ' + params.value + ' kW·h';
                            },
                            fontWeight: 'bold'
                        },
                        edgeLabel: {
                            show: true,
                            formatter: (params) => {
                                return params.name + ': ' + params.value;
                            },
                            // formatter: 'value: {c}'
                        },
                        emphasis: {
                            edgeLabel: {
                                // formatter: 'emphasis----{c}'
                            }
                        }
                    }],
                    tooltip: {trigger: 'item', triggerOn: 'mousemove'}
                };

                chart.setOption(option);

                function getNames() {
                    return sankeyData.reduce((names, item) => {
                        if (-1 == names.indexOf(item.source)) {
                            names.push(item.source);
                        }
                        if (-1 == names.indexOf(item.target)) {
                            names.push(item.target);
                        }
                        return names;
                    }, []).map(item => {return {name:item}});
                }
            });
        </script>
    </body>
</html>

